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Dessert

Irish Potato Custard

A custard made with mashed potatoes, egg yolks, sugar, cream, nutmeg, baked in a pastry crust.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Potato and nutmeg are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 1,052 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Irish Potato Custard

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

  1. Preheat the oven to 350°F (175°C).

Make the custard

  1. In a bowl, combine the boiled and mashed potatoes, egg yolks, sugar, cream, and nutmeg. Mix until smooth and well combined.

  2. Pour the mixture into a pastry-lined pie dish.

Bake and serve

  1. Bake in the preheated oven until set.

  2. Prepare a meringue and top the custard before serving.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Potato + nutmegtop 8% of all pairs
    Smell alikemoderate
    Cooked together1,052 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  2. Sugar + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

  3. Cream + nutmegtop 13% of all pairs
    Smell alikemoderate
    Cooked together7,920 recipes

    Shared aroma: acetic acid (sour, vinegar).

  4. Potato + creamtop 17% of all pairs
    Smell alikelow
    Cooked together2,481 recipes

    Shared aroma: 1-octen-3-one (mushroom, metallic).

  5. Egg + nutmegtop 17% of all pairs
    Smell alikelow
    Cooked together24,744 recipes

    Shared aroma: acetic acid (sour, vinegar).

Egg and nutmeg barely smell alike, yet cooks put them together in 24,744 recipes: they work on texture and structure more than aroma.

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Egg yolks
Bind the custard and help it set firm when baked.
Boiled and mashed potatoes
Provide body and a smooth, thick texture to the custard.
Cream
Adds richness and moisture, softening the custard's texture.
Sugar
Adds sweetness and helps balance the savoury potato flavour.

The step that matters

Bake until set. Egg yolks coagulate as they heat, thickening the custard. Underbaking leaves it runny, while overbaking can make it grainy or cause weeping, so check for a firm centre rather than relying on time alone.

Swap the potato

How well each one fits the dish's main ingredients (egg, sugar, cream, nutmeg):

  1. Sweet potatofits better
  2. Spinachfits better
  3. Leekfits better
  4. Potatothe original

Fit is the average pairing score against egg, sugar, cream, nutmeg. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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